论文标题
对张量原始光谱的振幅和倾斜的更新限制
Updated constraints on amplitude and tilt of the tensor primordial spectrum
论文作者
论文摘要
我们采用了一种全面的方法来更新张量与量表比（$ r $）和张量光谱索引（$ n_t $）的限制，使用二头肌/凯克阵列2015年和2018年的10个数据集，Planck发行了3和4，以及Ligo-Virgo-Kagra-Kagra-Kagra协作。 By fitting the complete $Λ$CDM+$r$+$n_t$ model with two different approaches for the tensor sector, we have not only established which method is the most reliable, but have also achieved the strongest constraint on the tensor-to-scalar ratio in current literature: $r<0.028$ and $-1.37 < n_t < 0.42$ at 95% confidence level.此外，我们对Nanograv协作检测到的共同信号的检查进一步证实，如果纳米格拉夫检测是由于原始的通货膨胀引力波背景，那么简单的幂律将无法调和不同数据集的约束，如文献中所示。
We have taken a comprehensive approach to update the limits on the tensor-to-scalar ratio ($r$) and the tensor spectral index ($n_t$), using 10 datasets from the BICEP/Keck Array 2015 and 2018, Planck releases 3 and 4, and LIGO-Virgo-KAGRA Collaboration. By fitting the complete $Λ$CDM+$r$+$n_t$ model with two different approaches for the tensor sector, we have not only established which method is the most reliable, but have also achieved the strongest constraint on the tensor-to-scalar ratio in current literature: $r<0.028$ and $-1.37 < n_t < 0.42$ at 95% confidence level. Furthermore, our examination of the common signal detected by the NANOGrav Collaboration further confirms that a simple power-law cannot reconcile the constraints from different datasets if the NANOGrav detection is due to a primordial inflationary gravitational wave background, as previously shown in the literature.
